Are there any best practices or alternative methods to securely exchange data between domains in PHP without using SESSION?

When exchanging data between domains in PHP, using SESSION variables may not always be the most secure option. One alternative method is to use encrypted tokens or JSON Web Tokens (JWT) to securely exchange data between domains. This helps prevent session hijacking and provides a more secure way to transfer information. 

// Example of using JWT to securely exchange data between domains

// Include the JWT library
require_once 'vendor/autoload.php';

use \Firebase\JWT\JWT;

// Set the data to be exchanged
$data = array(
    "user_id" => 12345,
    "username" => "john_doe"
);

// Set the key for encryption
$key = "secret_key";

// Create a JWT token
$token = JWT::encode($data, $key);

// Send the token to the other domain
// Example: echo $token;

// On the receiving domain, decode the token
$decoded_data = JWT::decode($token, $key, array('HS256'));

// Access the exchanged data
echo $decoded_data->user_id;
echo $decoded_data->username;

Keywords

CORS JSON Web Tokens HTTPS Cross-Origin Resource Sharing encryption

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